Major Thomas G. Blewett, a resident of Columbus, Mississippi, built the bridge in 1837.

According to the following thread, Camp Blewett was located near Blewett's Bridge on Luxapalila Creek, and was a place for sick and wounded soldiers during the summer of 1862.

I suggest you read the entire thread:

http://www.history-sites.com/cgi-bin/bbs62x/mscwmb/arch_config.pl?md=read;id=11102